JS学习笔记3 TextUtil.js

//文本对象


var TextUtil = new Object();




//文本框最大长度




TextUtil.isNotMax = function(oTextArea)...{


return oTextArea.value.length!=oTextArea.getAttribute("maxlength");


}






//阻止无效的字符




TextUtil.blockChars = function(oTextbox,oEvent)...{


oEvent = window.event;


var sInvalidChars = oTextbox.getAttribute("invalidchars");


var sChar = String.fromCharCode(oEvent.keyCode);




var bIsValidChar = sInvalidChars.indexOf(sChar) == -1;




return bIsValidChar




}






//允许有效的字符




TextUtil.allowChars = function(oTextbox,oEvent)...{


oEvent = window.event;


var sInvalidChars = oTextbox.getAttribute("validchars");


var sChar = String.fromCharCode(oEvent.keyCode);




var bIsValidChar = sInvalidChars.indexOf(sChar) > -1;




return bIsValidChar




}






//使用上下键操作数字




TextUtil.numericScroll = function(oTextbox,oEvent)...{


oEvent = window.event;


var iValue = oTextbox.value.length == 0 ? 0 :parseInt(oTextbox.value);




var iMax = oTextbox.getAttribute("max");


var iMin = oTextbox.getAttribute("min");






if(oEvent.keyCode == 38 )...{




if(iMax == null || iValue<parseInt(iMax))...{


oTextbox.value = (iValue + 1);}


}




else if (oEvent.keyCode == 40)...{




if(iMin == null || iValue > parseInt(iMin))...{


oTextbox.value = (iValue - 1);}


}


}






TextUtil.autosuggestMatch = function(sText,arrValues)...{


var arrResult = new Array;






if(sText !="")...{




for(var i=0;i<arrValues.length;i++)...{




if(arrValues[i].indexOf(sText)==0)...{


arrResult.push(arrValues[i]);


}


}


}


return arrResult;


}




TextUtil.autosuggest = function(oTextbox,arrValues,sListboxId)...{


var oListbox = document.getElementById(sListboxId);


ListUtil.clear(oListbox);


var arrMatches = TextUtil.autosuggestMatch(oTextbox.value,arrValues);






for(var i=0;i<arrMatches.length;i++)...{


ListUtil.add(oListbox,arrMatches[i]);


}


}