/*
Copyright (c) 2009, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.8.0r4
*/
YAHOO.widget.DateMath={DAY:"D",WEEK:"W",YEAR:"Y",MONTH:"M",ONE_DAY_MS:1000*60*60*24,WEEK_ONE_JAN_DATE:1,add:function(A,D,C){var F=new Date(A.getTime());switch(D){case this.MONTH:var E=A.getMonth()+C;var B=0;if(E<0){while(E<0){E+=12;B-=1;}}else{if(E>11){while(E>11){E-=12;B+=1;}}}F.setMonth(E);F.setFullYear(A.getFullYear()+B);break;case this.DAY:this._addDays(F,C);break;case this.YEAR:F.setFullYear(A.getFullYear()+C);break;case this.WEEK:this._addDays(F,(C*7));break;}return F;},_addDays:function(D,C){if(YAHOO.env.ua.webkit&&YAHOO.env.ua.webkit<420){if(C<0){for(var B=-128;C<B;C-=B){D.setDate(D.getDate()+B);}}else{for(var A=96;C>A;C-=A){D.setDate(D.getDate()+A);}}}D.setDate(D.getDate()+C);},subtract:function(A,C,B){return this.add(A,C,(B*-1));},before:function(C,B){var A=B.getTime();if(C.getTime()<A){return true;}else{return false;}},after:function(C,B){var A=B.getTime();if(C.getTime()>A){return true;}else{return false;}},between:function(B,A,C){if(this.after(B,A)&&this.before(B,C)){return true;}else{return false;}},getJan1:function(A){return this.getDate(A,0,1);},getDayOffset:function(B,D){var C=this.getJan1(D);var A=Math.ceil((B.getTime()-C.getTime())/this.ONE_DAY_MS);return A;},getWeekNumber:function(D,B,G){B=B||0;G=G||this.WEEK_ONE_JAN_DATE;var H=this.clearTime(D),L,M;if(H.getDay()===B){L=H;}else{L=this.getFirstDayOfWeek(H,B);}var I=L.getFullYear();M=new Date(L.getTime()+6*this.ONE_DAY_MS);var F;if(I!==M.getFullYear()&&M.getDate()>=G){F=1;}else{var E=this.clearTime(this.getDate(I,0,G)),A=this.getFirstDayOfWeek(E,B);var J=Math.round((H.getTime()-A.getTime())/this.ONE_DAY_MS);var K=J%7;var C=(J-K)/7;F=C+1;}return F;},getFirstDayOfWeek:function(D,A){A=A||0;var B=D.getDay(),C=(B-A+7)%7;return this.subtract(D,this.DAY,C);},isYearOverlapWeek:function(A){var C=false;var B=this.add(A,this.DAY,6);if(B.getFullYear()!=A.getFullYear()){C=true;}return C;},isMonthOverlapWeek:function(A){var C=false;var B=this.add(A,this.DAY,6);if(B.getMonth()!=A.getMonth()){C=true;}return C;},findMonthStart:function(A){var B=this.getDate(A.getFullYear(),A.getMonth(),1);return B;},findMonthEnd:function(B){var D=this.findMonthStart(B);var C=this.add(D,this.MONTH,1);var A=this.subtract(C,this.DAY,1);return A;},clearTime:function(A){A.setHours(12,0,0,0);return A;},getDate:function(D,A,C){var B=null;if(YAHOO.lang.isUndefined(C)){C=1;}if(D>=100){B=new Date(D,A,C);}else{B=new Date();B.setFullYear(D);B.setMonth(A);B.setDate(C);B.setHours(0,0,0,0);}return B;}};YAHOO.register("datemath",YAHOO.widget.DateMath,{version:"2.8.0r4",build:"2449"});