moumiGitKohom/webapps/totsys/common/js/drag.js

//////////////// Drag ////////////////
var dragThis;

function beginDrag() {
	dragThis = event.srcElement;
	while (dragThis.id.indexOf("ForDrag") == -1) {
		dragThis = dragThis.parentElement;
		if (dragThis == null)
			return;
	}
	dragThis=SetWin;
	oldX = (event.clientX + document.body.scrollLeft);
	oldY = (event.clientY + document.body.scrollTop); 
}

function dragIt(){
	if (dragThis == null) {
		return 
	};

	newX = (event.clientX + document.body.scrollLeft);
	newY = (event.clientY + document.body.scrollTop);

	var distanceX = (newX - oldX);
	var distanceY = (newY - oldY);

	oldX = newX;
	oldY = newY;
									
	dragThis.style.pixelLeft += distanceX;
	dragThis.style.pixelTop += distanceY;
				
	event.returnValue = false;
}

function endDrag() {
	dragThis = null;
}

function setDrag() {
	document.onmousemove = dragIt;
	document.onmousedown = beginDrag;
	document.onmouseup = endDrag;
	oldX=oldY=newX=newY=0, dragThis=null;
}

setDrag();