跨浏览器截取文本框的内容

//跨浏览器支持截取选择的文本框内容function getSelectedText(element){if(typeof element.selectStart == "number"){return element.value.substring(element.selectionStart,element.selectionEnd);}else if(document.selection){//IE8及以前版本return document.selection.createRange().text;}}//跨浏览器支持截取文本框的内容function captureText(element, selectionStart, length) {if (element.setSelectionRange) {element.setSelectionRange(selectionStart, length);} else {//IE8及以前版本var range = element.createTextRange();range.collapse();range.moveStart("character", selectionStart);range.moveEnd("character", length);range.select();}};