function checkSelect(){
	var opt = document.getElementsByTagName("select");
	var i = 0;
	var flag = true;
	for(i=0;i<opt.length;i++){
		var index = opt[i].selectedIndex;
		var value = opt[i].options[index].innerHTML;
		//alert(value);
		if(value=="Please Select"){
			flag=false;
			alert("Plesse choose color and size before add it to your cart.");
			break;
		}
	}
	return  flag;	
}