求助:任意选择下拉列表菜单选项,并执行对应的操作?
<script> function color(color){ document.getElementById("div").style.color=color; } </script> <div id='div'>请更换文字颜色</div> <select name="changecolor" onchange='color(this.value);'> <option value="black" selected>---黑色---</option> <option value="red">---红色---</option> <option value="green">---绿色---</option> <option value="blue">---蓝色---</option> <option value="yellow">---黄色---</option> </select> <br><font color="#e78608">------解决方案--------------------</font><br> <br> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> //包含jquery库,百度下<br><br>//用js就可以,类似下面这样。。<br> <script type="text/javascript"><br> jQuery(document).ready(function(){<br> jQuery('select[name=changecolor]').change(function(){<br> //alert(jQuery(this).val());<br> //改变颜色<br> jQuery(this).attr('selected',true);<br> jQuery(this).siblings().attr('selected',false);<br> <br> });<br> });<br> </script> <br><font color="#e78608">------解决方案--------------------</font><br>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title> new document </title> <meta name="generator" content="editplus" /> <meta name="author" content="" /> <meta name="keywords" content="" /> <meta name="description" content="" /> <script type="text/javascript" > //var tgs = new Array('div','td','tr'); var tgs = new Array('td','tr','div','span','a','html'); var szs = new Array( 'black','red','green','blue','yellow','yellow'); var startSz = 2; function tsize( trgt,inc ) { if (!document.getElementById) { return } var d = document,cEl = null,sz = startSz,i,j,cTags; sz = inc; if ( sz < 0 ) { sz = 0; } if ( sz > 6 ) { sz = 6; } startSz = sz; if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ]; cEl.style.color = szs[ sz ]; for ( i = 0 ; i < tgs.length ; i++ ) { cTags = cEl.getElementsByTagName( tgs[ i ] ); for ( j = 0 ; j < cTags.length ; j++ ) { cTags[ j ].style.color = szs[ sz ]; } } } function color(color){ tsize('body',color); } </script> </head> <body> <div id='div'>请更换文字颜色</div> <select name="changecolor" onchange='color(this.value);'> <option value="0" selected>---黑色---</option> <option value="1">---红色---</option> <option value="2">---绿色---</option> <option value="3">---蓝色---</option> <option value="4">---黄色---</option> </選択> <a href=""> ssss </a> <a>sdfsdf</a> <div> sddddddddddd</div> </ボディ> </html> <div class="clear"></div>