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PHP echo了一个旋钮，但是触发不了click事件

WBOY
WBOYOriginal
2016-06-13 11:22:321114browse

PHP echo了一个按钮，但是触发不了click事件

<br /><?php <br />echo '<input name="minus"  type="button" value="-" onclick="num_minus("xx");"/>';<br />echo '<input name="num" id="xx" type="text" width="16" value="1"'.'>';<br />echo '<input name="plus" type="button" value="+" onclick="num_plus("xx");"/>';<br />?><br /><script type="text/javascript"><br />function num_plus(id_num)<br />{<br />	document.getElementById(id_num).value++;<br />	//document.getElementById('num').value=parseInt(document.getElementById('num').value)+1;<br />        //parseInt(a,b)将a解析成b进制数<br />}<br />function num_minus(id_num)<br />{<br />	if(document.getElementById(id_num).value==1)<br />		document.getElementById(id_num).value=1;<br />	else<br />	    document.getElementById(id_num).value--;<br />}<br /></script><br /><br />

PHP 按钮 click
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