niceforms.js

Niceforms是一个脚本

		var selectWidth = parseInt(selects[q].className.replace(/width_/g, ""));
		center.style.width = selectWidth - 10 + 'px';
		selectArea.style.width = selectWidth + selectRightSideWidth + selectLeftSideWidth + 'px';
		button.style.width = selectWidth + selectRightSideWidth + selectLeftSideWidth + 'px';
		button.style.marginLeft = - selectWidth - selectLeftSideWidth + 'px';
		button.href = "javascript:showOptions("+q+")";
		button.onkeydown = selectEvent;
		button.className = "selectButton"; //class used to check for mouseover
		selectArea.className = "selectArea";
		selectArea.id = "sarea"+q;
		left.className = "left";
		right.className = "right";
		center.className = "center";
		right.appendChild(button);
		center.appendChild(text);
		selectArea.appendChild(left);
		selectArea.appendChild(right);
		selectArea.appendChild(center);
		//hide the select field
        selects[q].style.display='none'; 
		//insert select div
		selects[q].parentNode.insertBefore(selectArea, selects[q]);
		//build & place options div
		var optionsDiv = document.createElement('div');
		optionsDiv.style.width = selectWidth + 1 + 'px';
		optionsDiv.className = "optionsDivInvisible";
		optionsDiv.id = "optionsDiv"+q;
		optionsDiv.style.left = findPosX(selectArea) + 'px';
		optionsDiv.style.top = findPosY(selectArea) + selectAreaHeight - selectAreaOptionsOverlap + 'px';
		//get select's options and add to options div
		for(var w = 0; w < selects[q].options.length; w++) {
			var optionHolder = document.createElement('p');
			var optionLink = document.createElement('a');
			var optionTxt = document.createTextNode(selects[q].options[w].text);
			optionLink.href = "javascript:showOptions("+q+"); selectMe('"+selects[q].id+"',"+w+","+q+");";
			optionLink.appendChild(optionTxt);
			optionHolder.appendChild(optionLink);
			optionsDiv.appendChild(optionHolder);
			//check for pre-selected items
			if(selects[q].options[w].selected) {selectMe(selects[q].id,w,q);}
		}
		//insert options div
		document.getElementsByTagName("body")[0].appendChild(optionsDiv);
	}
}
function showOptions(g) {
		elem = document.getElementById("optionsDiv"+g);
		if(elem.className=="optionsDivInvisible") {elem.className = "optionsDivVisible";}
		else if(elem.className=="optionsDivVisible") {elem.className = "optionsDivInvisible";}
		elem.onmouseout = hideOptions;
}
function hideOptions(e) { //hiding the options on mouseout
	if (!e) var e = window.event;
	var reltg = (e.relatedTarget) ? e.relatedTarget : e.toElement;
	if(((reltg.nodeName != 'A') && (reltg.nodeName != 'DIV')) || ((reltg.nodeName == 'A') && (reltg.className=="selectButton") && (reltg.nodeName != 'DIV'))) {this.className = "optionsDivInvisible";};
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
}
function selectMe(selectFieldId,linkNo,selectNo) {
	//feed selected option to the actual select field
	selectField = document.getElementById(selectFieldId);
	for(var k = 0; k < selectField.options.length; k++) {
		if(k==linkNo) {selectField.options[k].selected = "selected";}
		else {selectField.options[k].selected = "";}
	}
	//show selected option
	textVar = document.getElementById("mySelectText"+selectNo);
	var newText = document.createTextNode(selectField.options[linkNo].text);
	textVar.replaceChild(newText, textVar.childNodes[0]);
}
function selectEvent(e) {
	if (!e) var e = window.event;
	var thecode = e.keyCode;
	switch(thecode){
		case 40: //down
			var fieldId = this.parentNode.parentNode.id.replace(/sarea/g, "");
			var linkNo = 0;
			for(var q = 0; q < selects[fieldId].options.length; q++) {if(selects[fieldId].options[q].selected) {linkNo = q;}}
			++linkNo;
			if(linkNo >= selects[fieldId].options.length) {linkNo = 0;}
			selectMe(selects[fieldId].id, linkNo, fieldId);
			break;
		case 38: //up
			var fieldId = this.parentNode.parentNode.id.replace(/sarea/g, "");
			var linkNo = 0;
			for(var q = 0; q < selects[fieldId].options.length; q++) {if(selects[fieldId].options[q].selected) {linkNo = q;}}
			--linkNo;
			if(linkNo < 0) {linkNo = selects[fieldId].options.length - 1;}
			selectMe(selects[fieldId].id, linkNo, fieldId);
			break;
		default:
			break;
	}
}
function replaceTexts() {
	for(var q = 0; q < texts.length; q++) {
		texts[q].style.width = texts[q].size * 10 + 'px';
		txtLeft = document.createElement('img'); txtLeft.src = imagesPath + "input_left.gif"; txtLeft.className = "inputCorner";
		txtRight = document.createElement('img'); txtRight.src = imagesPath + "input_right.gif"; txtRight.className = "inputCorner";
		texts[q].parentNode.insertBefore(txtLeft, texts[q]);
		texts[q].parentNode.insertBefore(txtRight, texts[q].nextSibling);
		texts[q].className = "textinput";
		//create hovers
		texts[q].onfocus = function() {
			this.className = "textinputHovered";
			this.previousSibling.src = imagesPath + "input_left_xon.gif";
			this.nextSibling.src = imagesPath + "input_right_xon.gif";
		}
		texts[q].onblur = function() {
			this.className = "textinput";
			this.previousSibling.src = imagesPath + "input_left.gif";
			this.nextSibling.src = imagesPath + "input_right.gif";
		}
	}
}
function replaceTextareas() {
	for(var q = 0; q < textareas.length; q++) {
		var where = textareas[q].parentNode;
		var where2 = textareas[q].previousSibling;
		textareas[q].style.width = textareas[q].cols * 10 + 'px';
		textareas[q].style.height = textareas[q].rows * 10 + 'px';
		//create divs
		var container = document.createElement('div');
		container.className = "txtarea";
		container.style.width = textareas[q].cols * 10 + 20 + 'px';
		container.style.height = textareas[q].rows * 10 + 20 + 'px';
		var topRight = document.createElement('div');
		topRight.className = "tr";
		var topLeft = document.createElement('img');
		topLeft.className = "txt_corner";
		topLeft.src = imagesPath + "txtarea_tl.gif";
		var centerRight = document.createElement('div');
		centerRight.className = "cntr";
		var centerLeft = document.createElement('div');
		centerLeft.className = "cntr_l";
		if(!this.ie) {centerLeft.style.height = textareas[q].rows * 10 + 10 + 'px';}
		else {centerLeft.style.height = textareas[q].rows * 10 + 12 + 'px';}
		var bottomRight = document.createElement('div');
		bottomRight.className = "br";
		var bottomLeft = document.createElement('img');
		bottomLeft.className = "txt_corner";
		bottomLeft.src = imagesPath + "txtarea_bl.gif";
		//assemble divs
		container.appendChild(topRight);
		topRight.appendChild(topLeft);
		container.appendChild(centerRight);
		centerRight.appendChild(centerLeft);
		centerRight.appendChild(textareas[q]);
		container.appendChild(bottomRight);
		bottomRight.appendChild(bottomLeft);
		//insert structure
		where.insertBefore(container, where2);
		//create hovers
		textareas[q].onfocus = function() {
			this.previousSibling.className = "cntr_l_xon";
			this.parentNode.className = "cntr_xon";
			this.parentNode.previousSibling.className = "tr_xon";
			this.parentNode.previousSibling.getElementsByTagName("img")[0].src = imagesPath + "txtarea_tl_xon.gif";
			this.parentNode.nextSibling.className = "br_xon";
			this.parentNode.nextSibling.getElementsByTagName("img")[0].src = imagesPath + "txtarea_bl_xon.gif";
		}
		textareas[q].onblur = function() {
			this.previousSibling.className = "cntr_l";
			this.parentNode.className = "cntr";
			this.parentNode.previousSibling.className = "tr";
			this.parentNode.previousSibling.getElementsByTagName("img")[0].src = imagesPath + "txtarea_tl.gif";
			this.parentNode.nextSibling.className = "br";
			this.parentNode.nextSibling.getElementsByTagName("img")[0].src = imagesPath + "txtarea_bl.gif";
		}
	}
}
function buttonHovers() {
	for (var i = 0; i < buttons.length; i++) {
		buttons[i].className = "buttonSubmit";
		var buttonLeft = document.createElement('img');
		buttonLeft.src = imagesPath + "button_left.gif";
		buttonLeft.className = "buttonImg";
		buttons[i].parentNode.insertBefore(buttonLeft, buttons[i]);
		var buttonRight = document.createElement('img');
		buttonRight.src = imagesPath + "button_right.gif";
		buttonRight.className = "buttonImg";
		if(buttons[i].nextSibling) {buttons[i].parentNode.insertBefore(buttonRight, buttons[i].nextSibling);}
		else {buttons[i].parentNode.appendChild(buttonRight);}
		buttons[i].onmouseover = function() {
			this.className += "Hovered";
			this.previousSibling.src = imagesPath + "button_left_xon.gif";
			this.nextSibling.src = imagesPath + "button_right_xon.gif";
		}
		buttons[i].onmouseout = function() {
			this.className = this.className.replace(/Hovered/g, "");
			this.previousSibling.src = imagesPath + "button_left.gif";
			this.nextSibling.src = imagesPath + "button_right.gif";
		}
	}
}
//Useful functions
function findPosY(obj) {
	var posTop = 0;
	while (obj.offsetParent) {posTop += obj.offsetTop; obj = obj.offsetParent;}
	return posTop;
}
function findPosX(obj) {
	var posLeft = 0;
	while (obj.offsetParent) {posLeft += obj.offsetLeft; obj = obj.offsetParent;}
	return posLeft;
}

window.onload = init;