变量作用域问题

function showDiv(Title,w,h,src,dac){
	var options = {modal: true,title:Title,closeText:"[x]",width:w,height:h,afterHide:function(){
			var div_modal_iframe=document.getElementById("frame");
			if(typeof dac != "function"){
	        	alert("parameter dac is not a function!");
		    } else {
		        dac(div_modal_iframe);
		    }
		    this.unload();
		}
	};
	var dialog = new Boxy("<div><iframe id='frame' src='"+src+"' height='"+300+"' width='"+600+"' style='border:0;' /></div>", options);
};

 

注意afterHide事件所调用的函数:

afterHide:function(){
			var div_modal_iframe=document.getElementById("frame");
			if(typeof dac != "function"){
	        	alert("parameter dac is not a function!");
		    } else {
		        dac(div_modal_iframe);
		    }

 

这里function中不能加dac参数，否则会弹出"parameter dac is not a function"