{"id":2153,"date":"2024-11-10T13:11:40","date_gmt":"2024-11-10T05:11:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/2153\/"},"modified":"2024-11-10T13:11:40","modified_gmt":"2024-11-10T05:11:40","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8ajax%e5%9c%a8javascript%e4%b8%ad%e5%ae%9e%e7%8e%b0%e7%9c%81%e5%b8%82%e5%8c%ba%e4%b8%89%e7%ba%a7%e8%81%94%e5%8a%a8%e5%8a%9f%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/2153\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528AJAX\u5728JavaScript\u4e2d\u5b9e\u73b0\u7701\u5e02\u533a\u4e09\u7ea7\u8054\u52a8\u529f\u80fd\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173067967372514.jpg\" class=\"aligncenter\" title=\"\u5982\u4f55\u4f7f\u7528AJAX\u5728JavaScript\u4e2d\u5b9e\u73b0\u7701\u5e02\u533a\u4e09\u7ea7\u8054\u52a8\u529f\u80fd\uff1f\u63d2\u56fe\" alt=\"\u5982\u4f55\u4f7f\u7528AJAX\u5728JavaScript\u4e2d\u5b9e\u73b0\u7701\u5e02\u533a\u4e09\u7ea7\u8054\u52a8\u529f\u80fd\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u4e09\u7ea7\u8054\u52a8js\u5b9e\u73b0<\/strong><\/p>\n<p>\u4f7f\u7528ajax\u5728javascript\u4e2d\u5b9e\u73b0\u7701\u5e02\u533a\u4e09\u7ea7\u8054\u52a8\u529f\u80fd\u3002<\/p>\n<p><strong>\u95ee\u9898\u5185\u5bb9\uff1a<\/strong><\/p>\n<p>\u5982\u4f55\u4f7f\u7528ajax\u5728javascript\u4e2d\u5b9e\u73b0\u7701\u5e02\u533a\u4e09\u7ea7\u8054\u52a8\uff1f<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u95ee\u9898\u7b54\u6848\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p><strong>\u521b\u5efaxmlhttprequest\u5bf9\u8c61\uff1a<\/strong><\/p>\n<pre>var obj = new xmlhttprequest();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p><strong>\u6253\u5f00\u8bf7\u6c42\uff1a<\/strong><\/p>\n<pre>obj.open(\"get\", \".\/sjld.php?fid=1\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p><strong>\u8bbe\u7f6e\u54cd\u5e94\u51fd\u6570\uff1a<\/strong><\/p>\n<pre>obj.onreadystatechange = function() {\n  if (obj.readystate == 4 &amp;&amp; obj.status == 200) {\n \/\/ \u83b7\u53d6\u54cd\u5e94\u5e76\u89e3\u6790json\u6570\u636e\n var flages = eval(obj.responsetext);\n\n \/\/ \u6e05\u7a7aselect\u5143\u7d20\n elc_1.innerhtml = \"\";\n\n \/\/ \u904d\u5386json\u6570\u636e\u5e76\u521b\u5efaoption\u5143\u7d20\n for (var i = 0; i &lt; flages.length; i++) {\n   var opt = document.createelement('option');\n   opt.text = flages[i].name;\n   opt.value = flages[i].id;\n   elc_1.appendchild(opt);\n }\n  }\n};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p><strong>\u53d1\u9001\u8bf7\u6c42\uff1a<\/strong><\/p>\n<pre>obj.send();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p><strong>\u5904\u7406\u54cd\u5e94\u6570\u636e\uff1a<\/strong><\/p>\n<ul>\n<li>\u89e3\u6790json\u6570\u636e\u3002<\/li>\n<li>\u6e05\u7a7aselect\u5143\u7d20\u3002<\/li>\n<li>\u904d\u5386json\u6570\u636e\u5e76\u521b\u5efaoption\u5143\u7d20\uff0c\u6dfb\u52a0\u5230select\u5143\u7d20\u4e2d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>&lt;select name='prov' id='prov'&gt;&lt;\/select&gt;\n&lt;select name='\u5e02' id='city'&gt;&lt;\/select&gt;\n&lt;select name='\u533a' id='area'&gt;&lt;\/select&gt;\n\n&lt;script type=\"text\/javascript\"&gt;\n  var elc = document.getElementsByTagName('select');\n  var elc_1 = elc[0];\n  var obj = new XMLHttpRequest();\n  obj.open(\"GET\", \".\/sjld.php?fid=1\");\n  obj.onreadystatechange = function() {\n    if (obj.readyState == 4 &amp;&amp; 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