Selected text when drag across frames...

[hombredelcubo]

Hello, I'm frustated because I can't solve a problem I've got.

I explain the develop envionment

i've got 3 frames in a page. In the left frame, i've got a tree which elements can be dragged to the main frame.
this is the code to simulate drag and drop action:

function handleMouseDown() {
		//if (!document.all) return;
		
		switch (event.button) {
			case 1:
				if (event.srcElement.className == "drag") {
					swDrag = true;
					document.onmousemove = handleMouseMove;
					break;
				}
				break;
			case 2:
				break;
		}
		return (false);
	}
	
	function handleMouseMove() {
		if (!swDrag)  return;
		
		oTemp = event.srcElement;
		
		if (isOverDropTarget(event.clientX, event.clientY)){
			oTemp.style.cursor = "pointer";
		}
		else{
			oTemp.style.cursor = "no-drop";
		}
		window.event.returnValue = false;
	}
	
	function handleMouseUp() {
		if (swDrag){
			if (isOverDropTarget(event.clientX, event.clientY)){
				...do something...
			}
			else{
				alert("item can't be dropped in this area");
			}
			swDrag = false;
		}
		break;
	}

	function isOverDropTarget(iX, iY) {
		
		var oTarget = parent.frames("mainFrame").document.getElementById("foo");
		
		var iX1 = findPosX(oTarget)+350;
		var iX2 = iX1 + oTarget.offsetWidth;
		var iY1 = findPosY(oTarget);
		var iY2 = iY1 + oTarget.offsetHeight ;
		
		return (iX >= iX1 && iX <= iX2 && iY >= iY1 && iY <= iY2);
	}

	  function findPosX(obj) {
			var curleft = 0;
			if (obj.offsetParent) {
				do {
					curleft += obj.offsetLeft;
					
					} 
				while (obj = obj.offsetParent);
			}
			return curleft;
		}
		
		function findPosY(obj) {
			var curtop = 0;
			if (obj.offsetParent) {
				do {
					
					curtop += obj.offsetTop;
					} 
				while (obj = obj.offsetParent);
			}
			return curtop;
		}

i don't know why but when i click in one item (text) and move it to other frame, the text of the left frame is selected.

could anyone help me??? thanks in advance

[langsor]

I think I would have to see the context that this script is run in -- the html and if any more javascript. Maybe create a basic (as small as possible) example of the entire page and post it here.

I did find a couple errors in the above though.
...do something... as plain text, and the following break; both are trouble makers.

Looking forward to seeing the rest of this script-page.