common.js

来自「c#网络聊天室源码c#网络聊天室源码c#网络聊天室源码」· JavaScript 代码 · 共 121 行



//公用函数
//相当于document.getElementById("")或getElementsByName
function $(strid) 
{
  var element = document.getElementById(strid);
  if (element) {
	return element;
  }
  else
  {
	return null;
  }
}

//have key down
function haveKeyDown(e,method)
{
	var pressedKey;
    
	if (!e) e = window.event;
	if (document.all){
		pressedKey = e.keyCode;
	}
	else{
		pressedKey = e.which;
	}
	//alert(pressedKey);
	if (pressedKey == 13) {
	    if (islogin) {
		    method.call(this,$("txtEdit").value);
	    }
	}
}

//have key up
function haveKeyUp(e)
{
	var pressedKey;
    
	if (!e) e = window.event;
	if (document.all){
		pressedKey = e.keyCode;
	}
	else{
		pressedKey = e.which;
	}
	if (pressedKey == 13) {
	    if (islogin) {
		    $("txtEdit").innerHTML ="";
	    }
	}
}
//move
//---------------------------
function fDragging(obj, e, limit){ 
    if(!e) e=window.event; 
    var x=parseInt(obj.style.left); 
    var y=parseInt(obj.style.top); 
     
    var x_=e.clientX-x; 
    var y_=e.clientY-y; 
     
    if(document.addEventListener){ 
        document.addEventListener('mousemove', inFmove, true); 
        document.addEventListener('mouseup', inFup, true); 
    } else if(document.attachEvent){ 
        document.attachEvent('onmousemove', inFmove); 
        document.attachEvent('onmouseup', inFup); 
    } 
    
    inFstop(e);
    inFabort(e) 
     
    function inFmove(e){ 
        var evt; 
        if(!e)e=window.event; 
         
        if(limit){ 
            var op=obj.parentNode; 
            var opX=parseInt(op.style.left); 
            var opY=parseInt(op.style.top); 
             
            if((e.clientX-x_)<0) return false; 
            else if((e.clientX-x_+obj.offsetWidth+opX)>(opX+op.offsetWidth)) return false; 
             
            if(e.clientY-y_<0) return false; 
            else if((e.clientY-y_+obj.offsetHeight+opY)>(opY+op.offsetHeight)) return false; 
        } 
         
        obj.style.left=e.clientX-x_+'px'; 
        obj.style.top=e.clientY-y_+'px'; 
         
        inFstop(e); 
    }
    function inFup(e){ 
        var evt; 
        if(!e)e=window.event; 
         
        if(document.removeEventListener){ 
            document.removeEventListener('mousemove', inFmove, true); 
            document.removeEventListener('mouseup', inFup, true); 
        } else if(document.detachEvent){ 
            document.detachEvent('onmousemove', inFmove); 
            document.detachEvent('onmouseup', inFup); 
        } 
         
        inFstop(e); 
    }

    function inFstop(e){ 
        if(e.stopPropagation) return e.stopPropagation(); 
        else return e.cancelBubble=true;             
    }
    function inFabort(e){ 
        if(e.preventDefault) return e.preventDefault(); 
        else return e.returnValue=false; 
    }
} 
//---------------------------