常用Javascript操作收集

• 小写金额与大写金额联动

<mce:script language="JavaScript"><!--
function daxie()
{
this.values = ["零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"];
this.digits = ["", "拾", "佰", "仟"];
}
function daxie.prototype.getdx(num)
{
if(isNaN(num)) return "";
var number = Math.round(num*100)/100;
number = number.toString(10).split('.');
var integer = number[0];
var len = integer.length;
if (len > 12)
return "数值超出范围！支持的最大数值为 999999999999.99";
var returnValue = this.bns(integer.slice(-4));
if (len > 4)
returnValue = this.bns(integer.slice(-8,-4)) + (integer.slice(-8,-4)!="0000"?"万":"") + returnValue;
if (len > 8)
returnValue = this.bns(integer.slice(-12,-8)) + "亿" + returnValue;
if(returnValue!="")
returnValue += "圆";
if(number.length==2)
{
var cok = number[1].split('');
if(returnValue!="" || cok[0]!="0")
returnValue += this.values[parseInt(cok[0])] + (cok[0]!="0"?"角":"");
if(cok.length>=2)
returnValue += this.values[parseInt(cok[1])] + "分";
}
if(returnValue!="" && !/分$/.test(returnValue))
returnValue += "整";
return returnValue;
}
function daxie.prototype.bns(str)
{
var num = str.split('');
var dsl = num.length-1;
var returnValue = "";
for (var i=0; i<=dsl; i++)
returnValue += this.values[parseInt(num[i])] + (num[i]!='0'?this.digits[dsl-i]:"");
returnValue = returnValue.replace(/零+$/, "").replace(/零{2,}/, "零");
return returnValue;
}
//////////////////////////////////////////////
var stmp = "";
var dfs = new daxie();
function nst(t)
{
if(t.value==stmp) return;
var ms = t.value.replace(/[^\d\.]/g,"").replace(/(\.\d{2}).+$/,"$1");
var txt = ms.split(".");
while(/\d{4}(,|$)/.test(txt[0]))
txt[0] = txt[0].replace(/(\d)(\d{3}(,|$))/,"$1,$2");
t.value = stmp = txt[0]+(txt.length>1?"."+txt[1]:"");
bbb.innerHTML ="<font color=red>"+dfs.getdx(parseFloat(ms))+"</font>";
}
// --></mce:script>
小写金额：<input type="text" name="aaa" onkeyup="nst(this)"><br>
大写金额： <SPAN id="bbb"> </SPAN>

• 获取文本框里鼠标选取到的文字

<textarea rows="10" cols="50" id="t1">  
请问如何获得 文本框里 鼠标选取到的文字？   
</textarea>  
<br>  
<button onClick="if (document.selection.createRange().text != '') t1.value = t1.value.replace(document.selection.createRange().text, '<b>' + document.selection.createRange().text + '</b>')"><b> B </b></button>  
<button onClick="if (document.selection.createRange().text != '') t1.value = t1.value.replace(document.selection.createRange().text, '<i>' + document.selection.createRange().text + '</i>')"><i> I </i></button>  

• 复选框的全选，多选，全不选，反选

<form name=hrong>  
<input type=checkbox name=All onclick="checkAll('mm')">全选<br/>  
<input type=checkbox name=mm onclick="checkItem('All')"><br/>  
<input type=checkbox name=mm onclick="checkItem('All')"><br/>  
<input type=checkbox name=mm onclick="checkItem('All')"><br/>  
<input type=checkbox name=mm onclick="checkItem('All')"><br/>  
<input type=checkbox name=mm onclick="checkItem('All')"><br/><br/>  
  
<input type=checkbox name=All2 onclick="checkReverse('mm2')">反选<br/>  
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>  
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>  
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>  
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>  
<input type=checkbox name=mm2 onclick="checkItem('All2')"><br/>  
<input type=checkbox name=All3 onclick="checkItem('mm3')">特选<br/>  
<input type=checkbox name=mm3 onclick="checkItem('All3')"><br/>  
  
  
</form>  
  
<SCRIPT LANGUAGE="JavaScript">  
function checkAll(str)   
{   
  var a = document.getElementsByName(str);   
  var n = a.length;   
  for (var i=0; i<n; i++)   
  a[i].checked = window.event.srcElement.checked;   
}   
  
function checkReverse(str)   
{   
  var a = document.getElementsByName(str);   
  var n = a.length;   
  for (var i=0; i<n; i++)   
  a[i].checked = !a[i].checked;   
}   
  
function checkItem(str)   
{   
  var e = window.event.srcElement;   
  var all = eval("document.hrong."+ str);   
  if (e.checked)   
  {   
    var a = document.getElementsByName(e.name);   
    all.checked = true;   
    for (var i=0; i<a.length; i++)   
    {   
      if (!a[i].checked){ all.checked = false; break;}   
    }   
  }   
  else all.checked = false;   
}   
</SCRIPT>  

滚动条滚动至最底端

document.body.scrollTop = document.body.scrollHeight;