js替换选中的文字

替换html中选中的文字

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function replaceSelection() {     if (window.getSelection) {         var selecter = window.getSelection();         var selectStr = selecter.toString();         if (selectStr.trim != "") {             var rang = selecter.getRangeAt(0);             var temp = $("<b>" + selectStr + "<b/>");             rang.surroundContents(temp[0]);         }     } else if (document.selection) {//ie         var selecter = document.selection.createRange();         selecter.select();         var selectStr = selecter.text;         selecter.pasteHTML("<b>" + selectStr + "<b/>");     } }

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