forms.js

java版源代码,里面包含很多源代码,大家可以看看.

function submitOnce(formName)
{
	this.formName=(formName) ? formName:0;

	if (document.forms && document.getElementsByTagName)
	{
		var subFields=eval('document.forms["'+this.formName+'"].getElementsByTagName("input");');

		var subFieldsLen=subFields.length;
		for (k=0; k<subFieldsLen; k++)
		{
			if (subFields[k].getAttribute("type").toLowerCase() == "submit") subFields[k].disabled=true;
			if (subFields[k].getAttribute("type").toLowerCase() == "reset") subFields[k].disabled=true;
		}
	}
}




/*******************************************************
SELECT ALL (HIGHLIGHT FIELD)
*******************************************************/
function selectAll(formField)
{
	temp=eval(formField);
	temp.focus();
	temp.select();
}




/*******************************************************
SINGLE-SELECT CHECKBOXES
This gives checkboxes the "one-at-a-time" functionality of radio buttons.
*******************************************************/
function radioButton(formName)
{
	this.formName=(formName) ? formName:0;
	
	this.select=function(what)
	{
		if (document.forms && document.getElementsByTagName)
		{
			var raFields=eval('document.forms["'+this.formName+'"].getElementsByTagName("input");');

			var raFieldsLen=raFields.length;
			for (i=0; i<raFieldsLen; i++)
			{
				if (raFields[i].getAttribute("type").toLowerCase() == "checkbox") raFields[i].checked=false;
				what.checked=true;
			}
		}
	}
}



/*******************************************************
CHECKBOXES
By Ryan Parman
- Click and Drag functionality by Peter Bailey, http://www.peterbailey.net
- Must be initialized as an object, then (optionally) attach an onload to the BODY tag, 
      either objName.enableMouseover(), or objName.enableClickDrag(), but not both.
- Use objName.check(), objName.clear(), or objName.toggle().
*******************************************************/
function checkbox(nameOfForm)
{
	// Store variables.
	this.nameOfForm=(nameOfForm) ? nameOfForm:0;
	this.toggleOnOff=1;

	// Can be used externally, but meant for internal use only.
	this.set=function(bool)
	{
		if (document.forms && document.getElementsByTagName)
		{
			var theFields=eval('document.forms["'+this.nameOfForm+'"].getElementsByTagName("input");');

			var theFieldsLen=theFields.length;
			for (i=0; i<theFieldsLen; i++)
			{
				if (theFields[i].getAttribute("type").toLowerCase() == "checkbox") theFields[i].checked=bool;
			}
		}
		else alert('Not Supported');
	}

	// Basic functions to use externally.
	this.check=function() { this.set(true); }
	this.clear=function() { this.set(false); }

	// Just a nifty little feature.
	this.toggle=function()
	{
		if (this.toggleOnOff) { this.set(true); this.toggleOnOff=0; }
		else if (!this.toggleOnOff) { this.set(false); this.toggleOnOff=1; }
	}

	// Call this during BODY onLoad to add mouseover functionality to the form.
	this.enableMouseover=function()
	{
		if (document.forms && document.getElementsByTagName)
		{
			var moFields=eval('document.forms["'+this.nameOfForm+'"].getElementsByTagName("input");');

			var moFieldsLen=moFields.length;
			for (i=0; i<moFieldsLen; i++)
			{
				if (moFields[i].getAttribute("type").toLowerCase() == "checkbox")
				{
					onMO=moFields[i];
					onMO.onmouseover=this.change;
				}
			}
		}
	}

	this.change=function() { this.checked=(this.checked) ? false:true; }

	// By Peter Bailey, www.peterbailey.net
	// Slight modifications by Ryan Parman, www.skyzyx.com
	this.enableClickDrag=function(sameNameOnly)
	{
		// Abort if browser can't do script
		if (document.all && !document.attachEvent) return true;
		else if (!document.all && !document.addEventListener) return true;
		//else if (document.all && !document.addEventListener) return true; // For retarded-ass Opera 7...

		// Initialize Variables/properties
		var f=eval('document.forms["'+this.nameOfForm+'"]');
		var dragObj=this;
		this.checked=false;
		this.mousedown=false;
		this.validClick=false;
		this.same=Boolean( sameNameOnly );

		// Attach Events
		if ( document.attachEvent )
		{
			f.attachEvent( "onmousedown", function() { downHandler( event.srcElement, dragObj ) } );
			f.attachEvent( "onmouseover", function() { overHandler( event.srcElement, dragObj ) } );
			document.attachEvent( "onmouseup", function() { upHandler( event.srcElement, dragObj ) } );
		}
		else
		{
			f.addEventListener( "mousedown", function( e ) { downHandler( e.target, dragObj ) }, false );
			f.addEventListener( "mouseover", function( e ) { overHandler( e.target, dragObj ) }, false );
			document.addEventListener( "mouseup", function( e ) { upHandler( e.target, dragObj ) }, false );
		}

		// Handler for form.onMouseDown event
		function downHandler(elem, o)
		{
			if (elem.type=="checkbox")
			{
				o.validClick=true;
				o.firstCB=elem;
				o.mousedown=true;
				o.checked=!elem.checked
				if (o.same) o.name=elem.name;
			}
		}

		// Handler for document.onMouseUp event
		function upHandler(elem, o)
		{
			if (o.validClick && o.firstCB)
			{
				o.firstCB.checked=o.checked;
				o.mousedown=false;
				o.checked=!o.checked;
				o.validClick=false;
				if (elem===o.firstCB) elem.checked=o.checked;
			}
		}

		// Hanlder for form.onMouseOver event
		function overHandler(elem, o)
		{
			if (elem.type=="checkbox" && o.mousedown)
			{
				if (o.same && elem.name == o.name) elem.checked=o.checked;
				else if (!o.same) elem.checked=o.checked;
			}
		}
	}
}