有问题的

Using HTML in a Dialog's title in jQuery UI 1.10

$.widget("ui.dialog", $.extend({}, $.ui.dialog.prototype, {    _title: function(title) {        if (!this.options.title ) {            title.html(" ");        } else {            title.html(this.options.title);        }    }}));

没问题的

样例

//设置角色function checkRole(userId){	var dialog = $("#dlgCheckRole").load(contextPath+"/role/checkRole?userId="+userId).removeClass('hide').dialog({		modal: true,		title: "
    
     
设置角色
    
",		//title: "设置角色",		//title_html: true,		width: 600,		height: 600, //auto		buttons: [ 			{				text: "Cancel",				"class" : "btn btn-minier",				click: function() {					$( this ).dialog( "close" ); 				} 			},			{				text: "OK",				"class" : "btn btn-primary btn-minier",				click: function() {					//$( this ).dialog( "close" ); 					saveCheckRole();				} 			}		],		close: function(){			//销毁dialog及内在元素	        $(this).dialog("destroy").empty();	    }	});	//设置标题	//$('#dlgCheckRole').dialog("option","title", "
    
     
 jQuery UI Dialog
    
");}

参考：