双击禁止选中文本

//双击禁止选中文本var clearSelection=function(){        if(document.selection&&document.selection.empty){            document.selection.empty();        }else if(window.getSelection){            var sel=window.getSelection();            sel.removeAllRanges();        }    };    //调用    $(element).bind("dblclick",function(event){        clearSelection();    });