javascript自定义字符串处理函数

yifangyou

1. /*
   
2.  * 去除前后空白字符
   
3.  * @author yifangyou
   
4.  * @use " bv ".trim()
   
5.  * @version gslb 2011-01-16
   
6.  * */
   
7. String.prototype.trim = function()
   
8. {
   
9.     return this.replace(/(^\s*)|(\s*$)/g, "");
   
10. }
    
11. 
    
12. 
    
13. 
    
14. /*
    
15.  * 判断是否以某字符串结尾
    
16.  * @author yifangyou
    
17.  * @use " bv a".endswith("a")
    
18.  * @version gslb 2011-01-16
    
19.  * */
    
20. String.prototype.endswith = function(findstr)
    
21. {
    
22.     if(this.length-findstr.length<0){
    
23.             return false;    
    
24.     }
    
25.   if(this.lastIndexOf(findstr)==this.length-findstr.length){
    
26.         return true;
    
27.     }
    
28.     return false;
    
29. }
    
30. 
    
31. 
    
32. /*
    
33.  * 只能输入英文数字.-下划线
    
34.  * @param str input的value
    
35.  * @use <input onkeyup="value=filterchar(value)" onafterpaste="value=filterchar(value)" />
    
36.  * @author yifangyou
    
37.  * @version gslb 2011-01-16
    
38.  * */
    
39. function filterchar(str){
    
40.     var p=/[^\w\-\.]/g
    
41.     return str.replace(p,'');
    
42. }
    
43. 
    
44. /*
    
45.  * 过滤特殊字符
    
46.  * @param str input的value
    
47.  * @use <input onkeyup="value=filterschar(value)" onafterpaste="value=filterschar(value)" />
    
48.  * @author yifangyou
    
49.  * @version gslb 2011-01-16
    
50.  * */
    
51. function filterschar(str){
    
52.         var p=/[\'\"#,;&%^\$!\+=\|\\\/ ]/g
    
53.         return str.replace(p,'');
    
54. }
    
55. 
    
56. /*
    
57.  * 过滤特殊字符 剔除,\除外
    
58.  * @param str input的value
    
59.  * @use <input onkeyup="value=filterschar2(value)" filterschar2="value=filterschar2(value)" />
    
60.  * @author yifangyou
    
61.  * @version gslb 2011-01-16
    
62.  * */
    
63. function filterschar2(str){
    
64.         var p=/[\'\"#,;&%^\$!\+=\|\\ ]/g
    
65.         return str.replace(p,'');
    
66. }
    
67. 
    
68. /*
    
69.  * 过滤中文和特殊字符
    
70.  * @param str input的value
    
71.  * @use <input onkeyup="value=filterchinese(value)" onafterpaste="value=filterchinese(value)" />
    
72.  * @author yifangyou
    
73.  * @version gslb 2011-01-16
    
74.  * */
    
75. function filterchinese(str){
    
76.         var p=/[\u4E00-\u9FA5\'\",&%^\$!\+=\|\\\/]/g
    
77.         return str.replace(p,'');
    
78. }
    
79. 
    
80. /*
    
81.  * 只允许输入中英文 "_" "-"
    
82.  * @param str input的value
    
83.  * @use <input onkeyup="value=filterschar2(value)" filterschar2="value=filterOnlyCE(value)" onafterpaste="value=filterOnlyCE(value)"/>
    
84.  * @author yifangyou
    
85.  * @version gslb 2011-01-16
    
86.  * */
    
87. function filterOnlyCE(str){
    
88.     var p=/[^\u4E00-\u9FA5\w\-]/g
    
89.         return str.replace(p,'');
    
90. }
    
91. 
    
92. 
    
93. 
    
94. /*
    
95.  * 只能输入数字
    
96.  * @param str input的value
    
97.  * @use <input onkeyup="value=filterNumeric(value)" onafterpaste="value=filterNumeric(value)" />
    
98.  * @author yifangyou
    
99.  * @version gslb 2011-01-16
    
100.  * */
     
101. function filterNumeric(str){
     
102.     var p=/[\D]/g
     
103.     return str.replace(p,'

end