jQuery.fn.DefaultValue = function(text){
    return this.each(function(){
		//Make sure we're dealing with text-based form fields
		if(this.type != 'text' && this.type != 'password' && this.type != 'textarea')
			return;
		
		//Store field reference
		var fld_current=this;
		
		//Set value initially if none are specified
        if(this.value=='') {
			this.value=text;
		} else {
			//Other value exists - ignore
			return;
		}
		
		//Remove values on focus
		$(this).focus(function() {
			if(this.value==text || this.value=='')
				this.value='';
		});
		
		//Place values back on blur
		$(this).blur(function() {
			if(this.value==text || this.value=='')
				this.value=text;
		});
		
		//Capture parent form submission
		//Remove field values that are still default
		$(this).parents("form").each(function() {
			//Bind parent form submit
			$(this).submit(function() {
				if(fld_current.value==text) {
					fld_current.value='';
				}
			});
		});
    });
};

 $(document).ready(function() {    
   
     //select all the a tag with name equal to modal  
     $('a[name=modal]').click(function(e) {  
         //Cancel the link behavior  
         e.preventDefault();  
         //Get the A tag  
         var id = $(this).attr('href');  
       
         //Get the screen height and width  
         var maskHeight = $(document).height();  
         var maskWidth = $(window).width();  
       
         //Set height and width to mask to fill up the whole screen  
         $('#mask').css({'width':maskWidth,'height':maskHeight});  
           
         //transition effect       
         $('#mask').fadeIn(1000);      
         $('#mask').fadeTo("slow",0.8);    
       
         //Get the window height and width  
         var winH = $(window).height();  
         var winW = $(window).width();  
                 
         //Set the popup window to center  
         $(id).css('top',  winH/2-$(id).height()/2);  
         $(id).css('left', winW/2-$(id).width()/2);  
       
         //transition effect  
         $(id).fadeIn(2000);   
       
     });  
       
     //if close button is clicked  
     $('.popup .close').click(function (e) {  
         //Cancel the link behavior  
         e.preventDefault();  
         $('#mask, .popup').hide();  
     });       
       
     //if mask is clicked  
     $('#mask').click(function () {  
         $(this).hide();  
         $('.popup').hide();  
     });           
       
 });