该小脚本实现的是对输入框内容中取出<img>标签中的src中的内容，然后在原来位置进行替换内容，然后在去除输入内容中的html标签，空格等操作
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title></title> <script> window.onload = function () { var target = document.getElementById("div1"); var but = document.getElementById("but"); var value; but.onclick = function () { value = target.innerHTML; result = dealText(value); alert(result); }; }; function dealText(msg) { var text1 = imageRound(msg); var text2 = removeTag(text1); var text3 = removeBlank(text2); var text4 = changeNBSP(text3); return text4; } function DealNum(num) { var content = []; for (var i = 0; i < num.length; i++) { // content.push(defaultSrc(num[i])); } return content; } function defaultSrc(src) { return ':avator:'; } function returnValue(srcValue) { var num = []; var pattern = /([^//]+)/./; var src; for (var i = 0; i < srcValue.length; i++) { src = pattern.exec(srcValue[i])[1]; num.push(src); }// alert(num); var source = DealNum(num); return source; } function imageRound(text) { var reg2 = /<img.*?/>/gi; var s = text.match(reg2); var num = returnValue(s); var i = 0; var content = text.replace(reg2, function () { return num[i++]; }); return content; } function removeTag(text) { var text1; var reg = /<.*?>|<.*?//>/g; text1 = text.replace(reg, ""); return text1; } function removeBlank(text) { var text1; var reg = //s+/g; text1 = text.replace(reg, ""); return text1; } function changeNBSP(text) { var text1; var reg = / /g; var reg1 = //;/g; text1 = text.replace(reg, ' '); text1 = text1.replace(reg1, ""); return text1; } </script></head><body><div contenteditable="true" id="div1">abc efg <img src="asdjk/123.jpg"/><span>hi gk</span><img src="ahdkh/124.jpg"/> <div>lmnop</div> q rst uvw</div><button id="but">更新</button></body></html>新闻热点
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