var imgnum = 0;
var ro_imageList = new Array();
var imageList = new Array();
var ro_images = new Array();
var images = new Array();

function preload(obj,pre_src){
    ro_imageList[imgnum] = pre_src;
    imageList[imgnum] = obj.src;
	imgnum = imgnum+1;
}
function loadImages(){
    for(i=0;i<imgnum;i++){
        ro_images[i] = new Image();
	    images[i] = new Image();
	    ro_images[i].src = ro_imageList[i];
	    images[i].src = imageList[i];
	    //document.getElementById('regPreload').src = imageList[i];
	    //document.getElementById('roPreload').src = ro_imageList[i];
	    //alert(i);
    }
}
function rolleffect(obj,new_src){
	obj.src = new_src;
}
function randomString() {
	var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
	var string_length = 8;
	var randomstring = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
	document.randform.randomfield.value = randomstring;
}