$(document).ready(function(){
$('.ContactForm').openDOMWindow({ 
height:500, 
width:720, 
overlayOpacity: '75',
positionType:'centered', 
positionTop:30, 
eventType:'click', 
positionLeft:50, 
windowSource:'iframe', 
windowPadding:0, 
loader:1, 
loaderImagePath:'/images/loading.gif', 
loaderHeight:32, 
loaderWidth:32
}); 
});