$(document).ready(function(){
	
	$("*[class^=WEB_boton]").filter(function(){
		
		$(this).bind("mouseover",function(){
			this.className=this.className+"_on";
		})
		
		$(this).bind("mouseout",function(){
			this.className=this.className.substring(0,(this.className.length-3))
		})

	})
	
})