通用IE和FireFox的多行文本框输入控制脚本代码,Asp.Net代码库,德仔网

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代码分类
【Asp.Net】通用IE和FireFox的多行文本框输入控制脚本
作者:zlkingdom / 发布于2015/1/27/ 663

	控件代码：

	<textarea id="Instruction" runat="server" class="textbox" maxlength="50" oninput="return onmyinput(this)"
	 onkeypress="return onmykeypress(this);" onpaste="return onmypaste(this);" onpropertychange="onmyinput(this)"
	 rows="4" style="width: 80%;margin-bottom: 8px;">

	

	JS代码：

	<mce:script type="text/javascript"><!--
	function onmyinput(o)
	{
	if(o.value.length>=o.getAttribute("maxlength"))
	{
	 if(o.value.length>o.getAttribute("maxlength"))
	 o.value = o.value.substring(0,o.getAttribute("maxlength"));
	 return false;
	}
	return true;
	}
	function mygetclipdata()
	{
	if(!document.all)
	{
	 netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
	 var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
	 var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
	 trans.addDataFlavor('text/unicode');
	 var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
	 clip.getData(trans,clip.kGlobalClipboard);
	 var str=new Object();
	 var strLength=new Object();
	 trans.getTransferData("text/unicode",str,strLength);
	 if (str)
	 str=str.value.QueryInterface(Components.interfaces.nsISupportsString);
	 var pastetext;
	 if (str)
	 pastetext=str.data.substring(0,strLength.value / 2);
	 return pastetext;
	}
	else
	{
	 return window.clipboardData.getData("Text");
	}
	}
	function mysetclipdata(o)
	{
	if(!document.all)
	{
	 netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
	 var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
	 var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
	 trans.addDataFlavor("text/unicode");
	 var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
	 str.data=o;
	 trans.setTransferData("text/unicode",str,o.length*2);
	 var clipid=Components.interfaces.nsIClipboard;
	 clip.setData(trans,null,clipid.kGlobalClipboard);
	}
	else
	{
	 window.clipboardData.setData("Text",o);
	}
	}
	function onmypaste(o)
	{
	var nMaxLen=o.getAttribute? parseInt(o.getAttribute("maxlength")):"";
	if(!document.all)
	{
	 alert("Don't execute code!");
	}
	else
	{

	 if(document.selection.createRange().text.length>0)
	 {
	 var ovalueandclipboarddata = o.value +window.clipboardData.getData("Text");
	 if(o.getAttribute && ovalueandclipboarddata.length-document.selection.createRange().text.length>nMaxLen)
	 {
	 if(window.clipboardData.getData("Text").substring(0,document.selection.createRange().text.length+nMaxLen-o.value.length)!="")
	 window.clipboardData.setData("Text",window.clipboardData.getData("Text").substring(0,document.selection.createRange().text.length+nMaxLen-o.value.length));
	 else
	 return false;
	 }
	 }
	 else
	 {
	 var ovalueandclipboarddata = o.value +window.clipboardData.getData("Text");
	 if(o.getAttribute && ovalueandclipboarddata.length>nMaxLen)
	 {
	 if(ovalueandclipboarddata.substring(0,nMaxLen-o.value.length)!="")
	 window.clipboardData.setData("Text",ovalueandclipboarddata.substring(0,nMaxLen-o.value.length));
	 else
	 return false;
	 }
	 }
	 return true;
	}
	}
	function onmykeypress(o)
	{
	if(!document.all)
	{
	 var nMaxLen=o.getAttribute? parseInt(o.getAttribute("maxlength")):"";

	 if(onmykeypress.caller.arguments[0].ctrlKey == true)
	 {
	 if(onmykeypress.caller.arguments[0].which==118)
	 {

	 if(o.selectionStart<o.selectionEnd)
	 {
	 var ovalueandclipboarddata = o.value + mygetclipdata();
	 if(o.getAttribute && (ovalueandclipboarddata.length-o.selectionEnd + o.selectionStart>nMaxLen))
	 {
	 if(mygetclipdata().substring(0,o.selectionEnd - o.selectionStart+nMaxLen-o.value.length)!="")
	 mysetclipdata(mygetclipdata().substring(0,o.selectionEnd - o.selectionStart+nMaxLen-o.value.length));
	 else
	 return false;
	 }
	 }
	 else
	 {
	 var ovalueandclipboarddata = o.value +mygetclipdata();
	 if(o.getAttribute && ovalueandclipboarddata.length>nMaxLen)
	 {
	 if(ovalueandclipboarddata.substring(0,nMaxLen-o.value.length)!="")
	 mysetclipdata(ovalueandclipboarddata.substring(0,nMaxLen-o.value.length));
	 else
	 return false;
	 }
	 }
	 return true;

	 }
	 }

	
	 if(onmykeypress.caller.arguments[0].which==0 || onmykeypress.caller.arguments[0].which==8)
	 return true;
	 if(o.value.length>=o.getAttribute("maxlength"))
	 {
	 if(o.selectionStart<o.selectionEnd)
	 return true;
	 if(o.value.length>o.getAttribute("maxlength"))
	 o.value = o.value.substring(0,o.getAttribute("maxlength"));
	 return false;
	 }
	 else
	 return true;
	
	}
	else
	{
	 if(document.selection.createRange().text.length>0)
	 return true;
	 if(o.value.length>=o.getAttribute("maxlength"))
	 return false;
	 else
	 return true;
	}
	}
	// --></mce:script>
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